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Finding the Fourth Proportional to 518,384.22, 715,283.49 and 288,891.24

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Solution

The fourth proportional to 518,384.22, 715,283.49 and 288,891.24 is: 398,621.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,384.22 : 715,283.49 = 288,891.24 : x
  2. Step 2: Convert to fraction form
    518,384.22/715,283.49 = 288,891.24/x
  3. Step 3: Cross multiply
    518,384.22x = 715,283.49 × 288,891.24
  4. Step 4: Simplify right side
    518,384.22x = 206,639,134,377.63
  5. Step 5: Solve for x
    x = 206,639,134,377.63/518,384.22
  6. Step 6: Final answer
    x = 398,621.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.